Ohoooo noooo!! I did not realise the system was already installed with
different mpirun... I was using mpirun from mpich which happened not to
have mpic++.
I am very sorry to waste everyone's time. I should have realised this
earlier.
Thank you for your help.
Hiroshi Higuchi
> 2. Are you sure that you're using LAM's mpicc/mpic++/mpirun? What does
> "which mpirun" show you? How about "ls -l `which mpirun`" -- is that
> the one that you just compiled and installed?
----------------------------------------------------
Hiroshi Higuchi <hiroshih_at_[hidden]>
----------------------------------------------------
----------------------- Original Message -----------------------
From: Jeff Squyres <jsquyres_at_[hidden]>
Date: Mon, 21 Jun 2004 07:07:37 -0400 (EDT)
Subject: Re: LAM: Running C++ MPI application on multiple nodes
> On Mon, 21 Jun 2004, Hiroshi Higuchi (2247990) wrote:
>
> > I wrote a simple HellowWorld application in C++. Unfortunately, it only
> > runs on the local node and does not run on remote nodes. The exact same
> > program in C works fine on multiple nodes.
> >
> > <Output from running C helloworld>
> > $ mpicc hello.c -o helloC
> > $ mpirun -np 5 helloC
> > Hello, world! I am 0 of 5.
> > Hello, world! I am 1 of 5.
> > Hello, world! I am 3 of 5.
> > Hello, world! I am 2 of 5.
> > Hello, world! I am 4 of 5.
> >
> > <Output from running C++ helloworld>
> > $ mpic++ hello.cpp -o helloCpp
> > $ mpirun -np 5 helloCpp
> > Hello, I am 0 of 1
>
> This is quite an odd error -- not only is your application only running on
> one node, your application *expects* there to only be one process (i.e.,
> the "0 of 1" part). This seems to indicate an error on mpirun's part,
> which seems quite unlikely.
>
> I have to admit that I'm somewhat at a loss as to how you could specify
> "-np 5" and only get a) one process running, and b) no other error output.
> Hmm.
>
> Here's some off-the-wall guesses:
>
> 1. What C++ compiler did you use to compile LAM? Are there any relevant
> directories that need to be in LD_LIBRARY_PATH for C++ libraries that are
> perhaps not in the remote node's environment?
>
> 2. Are you sure that you're using LAM's mpicc/mpic++/mpirun? What does
> "which mpirun" show you? How about "ls -l `which mpirun`" -- is that the
> one that you just compiled and installed?
>
> --
> {+} Jeff Squyres
> {+} jsquyres_at_[hidden]
> {+} http://www.lam-mpi.org/
> _______________________________________________
> This list is archived at http://www.lam-mpi.org/MailArchives/lam/
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